function Invoke-SnmpWalk {

[CmdletBinding()]
param (
    # Endpoint IP address.
    [Parameter(
        Mandatory = $true,
        HelpMessage = 'Endpoint IP address'
    )]
    [Net.IPAddress]$IP,

    # OID of root object.
    [Parameter(
        Mandatory = $true,
        HelpMessage = 'OID of root object'
    )]
    [string[]]$OIDStart,
   
    # SNMP Community.
    [string]$Community = 'private',
   
    # SNMP port.
    [int]$UDPport = 161,

    # SNMP version.
    [Lextm.SharpSnmpLib.VersionCode]$Version = 'V2',

    # "Walk" method mode.
    [Lextm.SharpSnmpLib.Messaging.WalkMode]$WalkMode = 'WithinSubtree',

    # Time out value.   
    [int]$TimeOut = 3000

)

    $OID = New-Object Lextm.SharpSnmpLib.ObjectIdentifier $OIDStart
    $results = New-Object Collections.Generic.List[Lextm.SharpSnmpLib.Variable]
    $endpoint = New-Object Net.IpEndPoint $IP, $UDPport
   
    try {
        [Lextm.SharpSnmpLib.Messaging.Messenger]::Walk(
            $Version,
            $endpoint,
            $Community,
            $OID,
            $results,
            $TimeOut,
            $WalkMode
        ) | Write-Verbose -Message { 'Found: {0}' -f [bool]$_ }
    } catch {
        Write-Warning "SNMP Walk issue: $_"
        return
    }
 
    foreach ($variable in $results) {
        New-Object PSObject -Property @{
            Data = $variable.Data.ToString()
        }
    }
}